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Sunday, December 12, 2010

How to Replace and Check CVVT.

How to Replace and Check CVVT.

 

How to Replace and Check CVVT.

Model: Hyundai Genesis BH

Year of Model: 2010

Fuel: Gasoline

Displacement: 4600cc

How to Replace and Check CVVT.

2011  G 4.6 DOHC Engine  Engine Control  P0085 Exhaust Valve Control Solenoid Circuit Low (Bank 2)

 

 

Study Guide and Component Location

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Study Guide and General Description

Study The CVVT (Continuously Variable Valve Timing) system is installed to the chain sprocket of the intake camshaft. Study This system controls the intake camshaft to provide the optimal valve timing for every driving condition. Study The ECM controls the Oil Control Valve(OCV), based on the signals output from mass air flow, throttle position and engine coolant temperature. Study The CVVT controller regulates the intake camshaft angle using oil pressure through the OCV. As result, Study the relative position between the camshaft and the crankshaft becomes optimal, and the engine torque improves, fuel economy improves, exhaust emissions decrease under overall driving conditions.

Study guide and DTC Description

Study When ECM detects short to ground in OCV(Bank 2-EX) control circuit, ECM sets DTC P0085.

Study guide and DTC Detecting Condition

Item

Detecting Condition

Possible Cause

Study

DTC Strategy

Power stage diagnosis(Exhaust)

Poor Connection

Open or Short to ground in power circuit

Open in control circuit

OCV

Enable Conditions

-

Study

Threshold value

 

Short circuit to ground

Diagnosis Time

Study

Continuous

MIL On Condition

2 Driving Cycles

Study Specification

Item

Specification

Resistance (Ω)

6.7 ~ 7.7 at 20°C(68°F)

Study Signal Waveform & Data

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Fig.1) Normal waveform of OCV at idle.

Fig.2) Normal waveform of OCV at acceleration.

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